Win32: fix regression in Mingw-w64 about IPv6 multicast
Win32: fix regression in Mingw-w64 about IPv6 multicast

Close #13071

xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc